Add the "bash" option to the "code-block"directive.
Add the "bash" option to the "code-block"directive.

Fixes #36475

By adding the "bash" argument, we avoid the following error and the docs
will display appropriately:
```
/root/SaltStack/salt/doc/topics/tutorials/gitfs.rst:918: ERROR: Error in "code-block" directive:
1 argument(s) required, 0 supplied.

.. code-block::

    Cmnd_Alias SALT_GIT_HOOK = /bin/salt-call event.fire_master update salt/fileserver/gitfs/update
    Defaults!SALT_GIT_HOOK !requiretty
    ALL ALL=(root) NOPASSWD: SALT_GIT_HOOK
```

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt